search for: page_bitmap

...ong get_max_pfn(void); + struct virtio_balloon { struct virtio_device *vdev; struct virtqueue *inflate_vq, *deflate_vq, *stats_vq; @@ -62,6 +64,9 @@ struct virtio_balloon { /* Number of balloon pages we've told the Host we're not using. */ unsigned int num_pages; + unsigned long *page_bitmap; + unsigned long start_pfn, end_pfn; + unsigned long bmap_len; /* * The pages we've told the Host we're not using are enqueued * at vb_dev_info->pages list. @@ -111,15 +116,66 @@ static void balloon_ack(struct virtqueue *vq) wake_up(&vb->acked); } +static int balloon_...

...ong get_max_pfn(void); + struct virtio_balloon { struct virtio_device *vdev; struct virtqueue *inflate_vq, *deflate_vq, *stats_vq; @@ -62,6 +64,9 @@ struct virtio_balloon { /* Number of balloon pages we've told the Host we're not using. */ unsigned int num_pages; + unsigned long *page_bitmap; + unsigned long start_pfn, end_pfn; + unsigned long bmap_len; /* * The pages we've told the Host we're not using are enqueued * at vb_dev_info->pages list. @@ -111,15 +116,66 @@ static void balloon_ack(struct virtqueue *vq) wake_up(&vb->acked); } +static int balloon_...

...virtio_device *vdev; > > struct virtqueue *inflate_vq, *deflate_vq, *stats_vq; @@ -62,6 +64,9 > > @@ struct virtio_balloon { > > > > /* Number of balloon pages we've told the Host we're not using. */ > > unsigned int num_pages; > > + unsigned long *page_bitmap; > > + unsigned long start_pfn, end_pfn; > > + unsigned long bmap_len; > > /* > > * The pages we've told the Host we're not using are enqueued > > * at vb_dev_info->pages list. > > @@ -111,15 +116,66 @@ static void balloon_ack(struct virtqueue...

...virtio_device *vdev; > > struct virtqueue *inflate_vq, *deflate_vq, *stats_vq; @@ -62,6 +64,9 > > @@ struct virtio_balloon { > > > > /* Number of balloon pages we've told the Host we're not using. */ > > unsigned int num_pages; > > + unsigned long *page_bitmap; > > + unsigned long start_pfn, end_pfn; > > + unsigned long bmap_len; > > /* > > * The pages we've told the Host we're not using are enqueued > > * at vb_dev_info->pages list. > > @@ -111,15 +116,66 @@ static void balloon_ack(struct virtqueue...

...rtio_balloon { > struct virtio_device *vdev; > struct virtqueue *inflate_vq, *deflate_vq, *stats_vq; > @@ -62,6 +64,9 @@ struct virtio_balloon { > > /* Number of balloon pages we've told the Host we're not using. */ > unsigned int num_pages; > + unsigned long *page_bitmap; > + unsigned long start_pfn, end_pfn; > + unsigned long bmap_len; > /* > * The pages we've told the Host we're not using are enqueued > * at vb_dev_info->pages list. > @@ -111,15 +116,66 @@ static void balloon_ack(struct virtqueue *vq) > wake_up(&vb-&g...

* Liang Li (liang.z.li at intel.com) wrote: <snip> > +static void free_extended_page_bitmap(struct virtio_balloon *vb) > +{ > + int i, bmap_count = vb->nr_page_bmap; > + > + for (i = 1; i < bmap_count; i++) { > + kfree(vb->page_bitmap[i]); > + vb->page_bitmap[i] = NULL; > + vb->nr_page_bmap--; > + } > +} > + > +static void kfree_page_bitm...

* Liang Li (liang.z.li at intel.com) wrote: <snip> > +static void free_extended_page_bitmap(struct virtio_balloon *vb) > +{ > + int i, bmap_count = vb->nr_page_bmap; > + > + for (i = 1; i < bmap_count; i++) { > + kfree(vb->page_bitmap[i]); > + vb->page_bitmap[i] = NULL; > + vb->nr_page_bmap--; > + } > +} > + > +static void kfree_page_bitm...

...; > struct virtqueue *inflate_vq, *deflate_vq, *stats_vq; @@ -62,6 +64,9 > > > @@ struct virtio_balloon { > > > > > > /* Number of balloon pages we've told the Host we're not using. */ > > > unsigned int num_pages; > > > + unsigned long *page_bitmap; > > > + unsigned long start_pfn, end_pfn; > > > + unsigned long bmap_len; > > > /* > > > * The pages we've told the Host we're not using are enqueued > > > * at vb_dev_info->pages list. > > > @@ -111,15 +116,66 @@ static void...

...ader. */ + void *resp_hdr; + /* Pointer to the start address of response data. */ + __le64 *resp_data; + /* Size of response data buffer. */ + unsigned int resp_buf_size; + /* Pointer offset of the response data. */ + unsigned int resp_pos; + /* Bitmap used to save the pfns info */ + unsigned long *page_bitmap[BALLOON_BMAP_COUNT]; + /* Number of split page bitmaps */ + unsigned int nr_page_bmap; + /* Used to record the processed pfn range */ + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; /* * The pages we've told the Host we're not using are enqueued * at vb_dev_info->pages list...

...balloon_resp_hdr resp_hdr; + /* Pointer to the start address of response data. */ + __le64 *resp_data; + /* Size of response data buffer. */ + unsigned int resp_buf_size; + /* Pointer offset of the response data. */ + unsigned int resp_pos; + /* Bitmap used to save the pfns info */ + unsigned long *page_bitmap[PAGE_BMAP_COUNT_MAX]; + /* Number of split page bitmaps */ + unsigned int nr_page_bmap; + /* Used to record the processed pfn range */ + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; /* * The pages we've told the Host we're not using are enqueued * at vb_dev_info->pages lis...

...> > > > entire page bitmap, This RFC patch has already considered about this. > > > > > > where's that addressed in code? > > > > > > > By record the start_pfn and end_pfn. > > > > The start_pfn & end_pfn will be updated in set_page_bitmap() and will > > be used in the function tell_host(): > > > > ---------------------------------------------------------------------- > > ----------- > > +static void set_page_bitmap(struct virtio_balloon *vb, struct page > > +*page) { > > + unsigned int i; &g...

...> > > > entire page bitmap, This RFC patch has already considered about this. > > > > > > where's that addressed in code? > > > > > > > By record the start_pfn and end_pfn. > > > > The start_pfn & end_pfn will be updated in set_page_bitmap() and will > > be used in the function tell_host(): > > > > ---------------------------------------------------------------------- > > ----------- > > +static void set_page_bitmap(struct virtio_balloon *vb, struct page > > +*page) { > > + unsigned int i; &g...

...nter to the start address of response data. */ > + __le64 *resp_data; > + /* Size of response data buffer. */ > + unsigned int resp_buf_size; > + /* Pointer offset of the response data. */ > + unsigned int resp_pos; > + /* Bitmap used to save the pfns info */ > + unsigned long *page_bitmap[PAGE_BMAP_COUNT_MAX]; > + /* Number of split page bitmaps */ > + unsigned int nr_page_bmap; > + /* Used to record the processed pfn range */ > + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; > /* > * The pages we've told the Host we're not using are enqueued &gt...

...nter to the start address of response data. */ > + __le64 *resp_data; > + /* Size of response data buffer. */ > + unsigned int resp_buf_size; > + /* Pointer offset of the response data. */ > + unsigned int resp_pos; > + /* Bitmap used to save the pfns info */ > + unsigned long *page_bitmap[PAGE_BMAP_COUNT_MAX]; > + /* Number of split page bitmaps */ > + unsigned int nr_page_bmap; > + /* Used to record the processed pfn range */ > + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; > /* > * The pages we've told the Host we're not using are enqueued &gt...

...on OOM"); @@ -67,6 +71,13 @@ struct virtio_balloon { /* Number of balloon pages we've told the Host we're not using. */ unsigned int num_pages; + /* Pointer of the bitmap header. */ + void *bmap_hdr; + /* Bitmap and bitmap count used to tell the host the pages */ + unsigned long *page_bitmap[BALLOON_BMAP_COUNT]; + unsigned int nr_page_bmap; + /* Used to record the processed pfn range */ + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; /* * The pages we've told the Host we're not using are enqueued * at vb_dev_info->pages list. @@ -110,16 +121,66 @@ static void b...

...on OOM"); @@ -67,6 +71,13 @@ struct virtio_balloon { /* Number of balloon pages we've told the Host we're not using. */ unsigned int num_pages; + /* Pointer of the bitmap header. */ + void *bmap_hdr; + /* Bitmap and bitmap count used to tell the host the pages */ + unsigned long *page_bitmap[BALLOON_BMAP_COUNT]; + unsigned int nr_page_bmap; + /* Used to record the processed pfn range */ + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; /* * The pages we've told the Host we're not using are enqueued * at vb_dev_info->pages list. @@ -110,16 +121,66 @@ static void b...

...truct virtio_balloon { > > /* Number of balloon pages we've told the Host we're not using. */ > unsigned int num_pages; > + /* Pointer of the bitmap header. */ > + void *bmap_hdr; > + /* Bitmap and bitmap count used to tell the host the pages */ > + unsigned long *page_bitmap[BALLOON_BMAP_COUNT]; > + unsigned int nr_page_bmap; > + /* Used to record the processed pfn range */ > + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; > /* > * The pages we've told the Host we're not using are enqueued > * at vb_dev_info->pages list. >...

...truct virtio_balloon { > > /* Number of balloon pages we've told the Host we're not using. */ > unsigned int num_pages; > + /* Pointer of the bitmap header. */ > + void *bmap_hdr; > + /* Bitmap and bitmap count used to tell the host the pages */ > + unsigned long *page_bitmap[BALLOON_BMAP_COUNT]; > + unsigned int nr_page_bmap; > + /* Used to record the processed pfn range */ > + unsigned long min_pfn, max_pfn, start_pfn, end_pfn; > /* > * The pages we've told the Host we're not using are enqueued > * at vb_dev_info->pages list. >...

...t; { > > > > - struct scatterlist sg; > > > > unsigned int len; > > > > > > > > - sg_init_one(&sg, vb->pfns, sizeof(vb->pfns[0]) * vb->num_pfns); > > > > + if (virtio_has_feature(vb->vdev, > > > VIRTIO_BALLOON_F_PAGE_BITMAP)) { > > > > + u32 page_shift = PAGE_SHIFT; > > > > + unsigned long start_pfn, end_pfn, flags = 0, bmap_len; > > > > + struct scatterlist sg[5]; > > > > + > > > > + start_pfn = rounddown(vb->start_pfn, BITS_PER_LONG); > > >...

...t; { > > > > - struct scatterlist sg; > > > > unsigned int len; > > > > > > > > - sg_init_one(&sg, vb->pfns, sizeof(vb->pfns[0]) * vb->num_pfns); > > > > + if (virtio_has_feature(vb->vdev, > > > VIRTIO_BALLOON_F_PAGE_BITMAP)) { > > > > + u32 page_shift = PAGE_SHIFT; > > > > + unsigned long start_pfn, end_pfn, flags = 0, bmap_len; > > > > + struct scatterlist sg[5]; > > > > + > > > > + start_pfn = rounddown(vb->start_pfn, BITS_PER_LONG); > > >...